thuba PTB 24 ATEX 1002 X Manuel page 25

Manual
PTB 24 ATEX 1002 X
Electromechanical high
temperature switch
Resetting only with tool
Manual resetting
Resetting only under
normal operating conditions
Tamperproof setting
Independent of the controller
Sensor fail-safe function (if cap-
illary tube fractures)
Functional test to IEC 60730
Part 1 and Parts 2–9
or EN 50495
Table 1: Requirements for safety temperature limiters
4.4 Installation of heat trace system
The connection box is fixed mechanically. It is
necessary to ensure that the IP protection of the
connection box is still ensured.
When installing trace heating cables, the mini-
mum installation temperature and the minimum
bending radius of the cable must be taken into
account. Furthermore, the maximum tempera-
ture stability of the cable must not be exceeded
(see Annex A and Annex B).
Detailed information can be found in the
brochure «Installation guidelines for trace heat-
ing systems with heating cables».
4.5 Equipotential bonding
There are internal and external potential connec-
tion terminals for the safe connection of the
equipotential bonding conductor. Depending
upon the version, they are designed for a mini-
mum terminal cross section of 4 mm².
Edition May 2024
Copyright
/
PTB 24 ATEX 1003 X
Processor-controlled high
temperature switch
Resetting only possible with
user code
Resetting only by authorized
personnel in control cabinet
Resetting only under
normal operating conditions
Setting of temperature class
only possible with hard-wired
jumper and Manufacturer's
code
Independent of the controller
100% sensor monitoring
Functional test
17
thuba Ltd., CH-4002 Basel
Switzerland